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Definition of Sets

Which of the ...

Question

Which of the following collections are sets?
Rich people in your city

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Solution

No, it is not a set because it is not well defined, and there is no set parameter which can decide whether a person is rich or not.

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Similar questions

Q. Which of the following collections are sets?
(i) The collection of rich people in your district.
(ii) The collection of natural number less than 50.
(iii) the collection of most talented persons of India.
(iv) the collection of first ten prime integers.
(v) The collection of all days in a week starting with the letter 'T'
(vi) The collection of some months in a year.
(vii) the collection of all books in your school library.
(viii) the collection of smart boys in your class.
(ix) The collection of multiples of 7.
(x) The collection of students in your class who got a lot of marks in the first unit test.

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(a) All the students of your school.
(b) Members of Indian parliament.
(c) The colours of rainbow.
(d) The people of Karnataka having green ration card.
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Which of the following collections are sets ? Justify your answer :

(i) A collection of all natural numbers less than 50.

(ii) The collection of good hockey players in India.

(iii) The collection of all girls in your class.

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